# -*- coding: utf-8 -*-
# Author: xiantingDeng
# File: 04_交换两个变量的值.py
# Time: 21:47

a = 4
b = 5

# 第一种
# c = 0
# c = a
# a = b
# b = c

# 第二种
# a += b
# b = a - b
# a = a - b


# 第三种
a,b = b,a
print(a,b)